Degradation rather than warming delays onset of reproductive phenology of annual Chenopodium glaucum on the Tibetan Plateau
Degradation rather than warming delays onset of reproductive phenology of annual Chenopodium glaucum on the Tibetan Plateau
复制标题
退化而不是变暖延迟了青藏高原一年生灰藜繁殖物候的开始
DOI：
10.1016/j.agrformet.2021.108688
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发表时间：
2021-12
影响因子：
6.2
通讯作者：
Shiping Wang
中科院分区：
文献类型：
--
作者：
Ji Suonan;Shujuan Cui;Wangwang Lv;Wenying Wang;Bowen Li;Peipei Liu;Huan Hong;Yang Zhou;Qi Wang;Lili Jiang;Tsechoe Dorji;Shiping Wang
随着气候变暖和过度放牧导致的高寒草甸退化和荒漠化，青藏高原一年生植物物种的分布大大扩大。在过去的几十年里，大多数物候学研究主要集中在多年生植物上，很少有人研究一年生植物的物候学，尽管它们的生活史不同。缺乏关于退化地区一年生植物的物候序列如何响应气候变暖的知识，限制了我们在未来变暖下恢复和保护退化的高山生态系统的能力。为了研究退化和变暖对一年生植物青藜物候序列的独立和交互影响，2014-2016年，我们在青藏高原进行了双因素对照试验(退化：中度和重度退化；变暖：不变暖和开顶室变暖)。结果表明，在一年中的6个物候期中，只有1个物候期延迟了初座期。然而，退化推迟了一年生植物生殖物候的开始，这可能是由于退化导致土壤养分、地上生物量和丰富度下降所致。此外，退化和变暖对物候事件的独立和交互作用表现出显著的年际变化。鉴于青冈在沙化土地定居和促进植被恢复方面的重要作用，这些机制可能是该物种在青藏高原高度退化的高寒草甸生存所必需的。
With degradation and desertification of alpine meadows due to climate warming and overgrazing, the distribution of annual plant species has greatly expanded on the Tibetan Plateau. Most phenological studies in the past decades have mainly focused on perennial plants, and few have studied the phenology of annual plants, despite their different life history. Lack of knowledge regarding how phenological sequences of annual plants respond to climatic warming in degraded areas limits our ability to restore and protect degraded alpine ecosystems under future warming. To study the independent and interactive effects of degradation and warming on the phenological sequences of the annual plant, Chenopodium glaucum, we conducted a two-factor control experiment (degradation: moderate and severe degradation; warming: non-warming and open-top chamber warming) on the Tibetan Plateau during 2014–2016. Our results indicated that out of six phenophases of the annual plant warming only delayed first fruit setting. However, degradation delayed the onset of reproductive phenology of the annual plant, which may cause by decreased soil nutrient, above-ground biomass and richness led by degradation. Furthermore, the independent and interactive effects of degradation and warming on phenological events showed significant interannual variation. Given the vital role of C. glaucum on colonizing desertified ground and promoting vegetation restoration, these mechanisms may be essential for the persistence of the species in the highly degraded alpine meadows on the Tibetan Plateau.
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影响因子：
8.8
作者：
Gedan, Keryn B.;Bertness, Mark D.
通讯作者：
Bertness, Mark D.
影响因子：
4.8
作者：
秦军
通讯作者：
秦军
植物物种多样性的实际丧失降低了西藏高寒草甸的土壤质量
影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
M. Mayfield;J. Dwyer;A. Main;J. Levine
影响因子：
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作者：
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通讯作者：
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